The problem for Democrats is now obvious: Having created their army of brainwashed little climate change monsters, the have to keep moving Left to satisfy their appetite for bigger government, more regulations and more laws and more limits on what we can do, more restrictions on what we can think and say and become, and the “Green New Deal” is just the start.

Mr. O’Rourke’s assertion is not just some ill-considered comment whipped up in the political frenzy of the moment. In a tweet, he doubled down. “Border Patrol reported 329 migrant deaths in 2016. In 2017, 294 deaths. Seven were children,” he pointed out, underscoring the grievous humanitarian obligation that America has to finally secure our dangerous border with Mexico. Again, if he cared about poor, dying migrant children as much as he cares about “partisanship and rhetoric,” Mr. O’Rourke would acknowledge that, indeed, walls do work.

If O’Rourke runs, he will do fine in places like Austin and other college towns. But he’ll flop in the places that cost Hillary Clinton the 2016 election — the big city precincts where the African-American vote is crucial to any candidate’s success. From 2012 to 2016, black voter turnout dropped dramatically and clearly demonstrated that no Democrat can win without generating a level of enthusiasm among minorities comparable to that which Barack Obama enjoyed. A white bread candidate like Beto, with a skateboard and a billionaire wife, will never cut it. The left’s lovesick yearning for Beto will not end well.